Ejemplo n.º 1
0
func main() {
	stdscr, err := goncurses.Init()
	if err != nil {
		log.Fatal("init", err)
	}
	defer goncurses.End()

	goncurses.Raw(true)   // turn on raw "uncooked" input
	goncurses.Echo(false) // turn echoing of typed characters off
	goncurses.Cursor(0)   // hide cursor
	stdscr.Keypad(true)   // allow keypad input

	stdscr.Print("Press a key...")
	stdscr.Refresh()

	if ch := stdscr.GetChar(); ch == goncurses.KEY_F2 {
		stdscr.Print("The F2 key was pressed.")
	} else {
		stdscr.Print("The key pressed is: ")
		stdscr.AttrOn(goncurses.A_BOLD)
		stdscr.AddChar(goncurses.Char(ch))
		stdscr.AttrOff(goncurses.A_BOLD)
	}
	stdscr.Refresh()
	stdscr.GetChar()
}
Ejemplo n.º 2
0
func main() {
	scr, err := gc.Init()
	if err != nil {
		log.Fatal("init:", err)
	}
	defer gc.End()

	gc.Echo(false)

	scr.Println("Type characters to have them appear on the screen.")
	scr.Println("Press 'q' to exit.")
	scr.Println()

	// Accept input concurrently via a goroutine and connect a channel
	in := make(chan gc.Char)
	ready := make(chan bool)
	go func(w *gc.Window, ch chan<- gc.Char) {
		for {
			// Block until all write operations are complete
			<-ready
			// Send typed character down the channel (which is blocking
			// in the main loop)
			ch <- gc.Char(w.GetChar())
		}
	}(scr, in)

	// Once a character has been received on the 'in' channel the
	// 'ready' channel will block until it recieves another piece of data.
	// This happens only once the received character has been written to
	// the screen. The 'in' channel then blocks on the next loop until
	// another 'true' is sent down the 'ready' channel signalling to the
	// input goroutine that it's okay to receive input
	for {
		var c gc.Char
		select {
		case c = <-in: // blocks while waiting for input from goroutine
			scr.Print(string(c))
			scr.Refresh()
		case ready <- true: // sends once above block completes
		}
		// Exit when 'q' is pressed
		if c == gc.Char('q') {
			break
		}
	}
}
Ejemplo n.º 3
0
func main() {
	stdscr, err := gc.Init()
	if err != nil {
		log.Fatal("init:", err)
	}
	defer gc.End()

	// HasColors can be used to determine whether the current terminal
	// has the capability of using colours. You could then chose whether or
	// not to use some other mechanism, like using A_REVERSE, instead
	if !gc.HasColors() {
		log.Fatal("Example requires a colour capable terminal")
	}

	// Must be called after Init but before using any colour related functions
	if err := gc.StartColor(); err != nil {
		log.Fatal(err)
	}

	gc.Echo(false)

	// Initialize a colour pair. Should only fail if an improper pair value
	// is given
	if err := gc.InitPair(1, gc.C_RED, gc.C_WHITE); err != nil {
		log.Fatal("InitPair failed: ", err)
	}
	gc.InitPair(2, gc.C_BLACK, gc.C_CYAN)

	stdscr.Println("Type any key to proceed and again to exit")

	// An example of trying to set an invalid color pair
	err = gc.InitPair(-1, gc.C_BLACK, gc.C_CYAN)
	stdscr.Println("An intentional error:", err)

	stdscr.Keypad(true)
	stdscr.MovePrint(12, 30, "Hello, World!!!")
	stdscr.Refresh()
	stdscr.GetChar()
	// Note that background doesn't just accept colours but will fill
	// any blank positions with the supplied character too. Note that newly
	// added text with spaces in it will have the blanks converted to the fill
	// character, if given
	stdscr.SetBackground(gc.Char('*') | gc.ColorPair(2))
	// ColorOn/Off is a shortcut to calling AttrOn/Off(gc.ColorPair(pair))
	stdscr.ColorOn(1)
	stdscr.MovePrint(13, 30, "Hello, World in Color!!!")
	stdscr.ColorOff(1)
	stdscr.Refresh()
	stdscr.GetChar()
}